(19)

(11)

EP 2 422 221 A2

(12)

(88) Date of publication A3: 20.01.2011 (43) Date of publication: 29.02.2012 Bulletin 2012/09 (21) Application number: 10767480.6 (22) Date of filing: 19.03.2010

(51) International Patent Classification (IPC):  G01V 1/38(2006.01) G01V 1/02(2006.01) G01V 1/28(2006.01) G01V 1/30(2006.01) (86) International application number: PCT/US2010/027954 (87) International publication number: WO 2010/123639 (28.10.2010 Gazette 2010/43)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 24.04.2009 US 429328 (71) Applicant: Geco Technology B.V. 2586 BJ S'Gravenhage (NL)	(72) Inventors: MOORE, Ian Mosman Park WA 6012 (AU) BEASLEY, Craig, J. Houston TX 77024 (US) DRAGOSET, William, Henry, Jr. Houston TX 77071 (US) (74) Representative: Bailey, Richard Alan  Marks & Clerk LLP 27 Imperial Square Cheltenham Gloucestershire GL50 1RQ Cheltenham Gloucestershire GL50 1RQ (GB)